Red acro bug

Taxobox
name = Red acro bug

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image_width = 200px
image_caption = A typical red bug infestation on an acroporid.
regnum = Animalia
phylum = Arthropoda
subphylum = Crustacea
classis = Maxillopoda
subclassis = Copepoda
ordo = Harpacticoida
familia = Tegastidae
genus = "Tegastes"
species = "T. acroporanus"
binomial = "Tegastes acroporanus"
binomial_authority = Humes, 1981 [cite web |url=http://ravenel.si.edu/iz/copepod/species/list_all_species_by_family.cfm?StartRow=19751 |title=The World of Copepods - Species Taxonomy Results |publisher=Smithsonian Institution]

"Tegastes acroporanus", also known as the red acro bug for the red coloration on its body and for its prey, "Acropora", are copepods in the family Tegastidae. Red acro bugs are parasitic on the hard coral reef building corals in the genus "Acropora", and feed on these corals exclusively. Though it has been found on all types of "Acropora", it seems to be less predominant on species with large, “hairy” polyps such as the species "A. millepora".Fact|date=April 2007 Being a copepod, they creatures small, and many times can be difficult to see with the naked eye. However, their existence on a suspected affected "Acropora" can be determined either by looking for the typical symptoms of "T. acroporanus" or by shining a flashlight on the suspected "Acropora" and looking for tiny fluorescent specks, caused by the light bouncing off the red pigment in the bugs' bodies.

When on an "Acropora" they remain, for the most part, stationary and will spend most of their time consuming the tissue of the acropora. They are very difficult to dislodge once stationary, using their appendages to latch onto the "Acropora" and are not removable even by suction or strong water movement, which may in turn, damage the "Acropora". A small number will leave a coral if the coral is disturbed and will swim in the water column, looking for another host.

First reports of this aquatic pest came in the early 2000s and the infestation sped quickly throughout the marine keeping hobby around the world with the popularity of coral fragment trading.Fact|date=April 2007 Due to the potential threat of this parasitic copepod to the hobby, many different treatments have been tried and testing through the years and it is now possible to stop or at least slow the infestation of "T. acroporanus".

While "Tegastes acroporanus" or the red acro bug is a parasite on "Acropora" corals, it does not always kill the coral. The overall health of the host prior to infestation, the overall health of the aquarium system, and the degree of colonization will contribute to whether or not an affected "Acropora" can withstand the infestation.

There are several possible signs of an infestation of red acro bugs:
* reduced extension of polyps and/or the coral tissue
* change in coloration, typically involving a loss of colored pigments from tips and branches, and a change to a more uniform brown color
* reduced or stalled growth rates
* loss of tissue pigmentation including the loss of zooxanthellae pigmentation resulting in a bleached appearance
* local or colony-wide tissue loss, possibly as a result of colonization stress rather than from direct consumption of tissue by predation
* death of the colony

The dragonface pipefish, "Corythoichthys haematopterus", is a natural predator of the red acro bugFact|date=February 2007.

References and further reading

* "The Reef Aquarium Volume 3", by J. Charles Delbeek and Julian Sprung
* "Book of Coral Propagation Volume 1", by Anthony Calfo